One of the main properties of the TCPA/Palladium
architecture is the (asserted) ability to
limit information leaking to untrusted parties.
In what way does this affect the appearance of
computers as we know them today? It certainly
means more than that you can't simply forward
copyright protected informations by email in
plaintext.
I remember that about 20-25 years ago I read in
one of the early computer magazines a proposal how
to build a cheap printer from a plain electrical
typewriter by attaching a board with electromagnetically
operated punchers onto the keyboard without any
modification (!) of the typewriter itself.
Assumed that a trusted computer is completely
sealed, it still needs some kind of human interface,
probably a mouse, a keyboard, and a screen
(otherwise whould be questionable what to pay for).
Even if the computer is tamperproof, you still
could attach such a board simulating your fingers
on the keyboard and a camera in front of the screen
doing OCR. Should not be much of a problem to
teach an untrusted Linux box to read from a
trusted sealed machine, reading an e-book page by page.
As a consequence, it is not enough to just
encrypt the connection between the computer
and the monitor or the keyboard. An encryption of
the connection between the computer and the
authorized person itself is needed.
The solution would be to implant chips in
one's head and to connect them to the eye
and ear nervers, thus injecting the
decrypted information directly into the
brain.
This also solves the problem that when
a person who has paid reads an e-book,
always other persons who didn't pay could
watch too.
Of course, blue screens become a much
more intense experience once they can
happen directly in your head and
completely shut down your visual
and acoustical perception.
Hadmut
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